Event Driven State Machine Lab

BME554L - Fall 2025 - Palmeri

Lab

Author

Dr. Mark Palmeri, M.D., Ph.D.

Published

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Wireless Heart Rate Monitor State Diagram

Generate a state diagram for a wristwatch-based heart rate monitor that sends “instantaneous” heart rate data to a smartphone.
- ✔️ I would recommend doing this with pencil and paper first, not immediately jumping into a tool.
- Err on the side of more detail than not.
Make sure that your state diagram:
- Has start and termination dots.
- Includes all functional states, including (but not limited to):
  - Init
  - Idle
  - Measuring
  - Transmitting
  - Error
- Consider if states should have entry and exit actions.
- Make sure all transitions between states are annotated with associated triggering events.

Generate the State Diagram

Formally render your state diagram using either:
- PlantUML (the tool shown in lecture)
- Mermaid
- draw.io
- Lucidchart

Gradescope

Upload your rendered state diagram to the associated Gradescope assignment.